Therochelonia

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Therochelonia
Temporal range: Late Permian - Early Cretaceous
Cistecephalus1DB.jpg
Life restoration of Cistecephalus Cistecephalus microrhinus
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Synapsida
Order: Therapsida
Infraorder: Dicynodontia
Parvorder: Therochelonia
Seeley, 1894
Subgroups

See text.

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Therochelonia is a group of dicynodont therapsids. The group was named by British paleontologist Harry Seeley in 1894 and fell into disuse in the following century. Therochelonia was redefined as a node-based clade in 2009. It is defined as the last common ancestor of Cistecephalus microrhinus and Dicynodon lacerticeps, and all of its descendants.[1] Below is a simplified cladogram from Kammerer et al. (2011) showing the phylogenetic placement of Therochelonia:[2]

Dicynodontia 

Eodicynodon




Pylaecephalidae




Eumantellidae




Endothiodontidae


 Therochelonia 
 Emydopoidea 

Emydopidae




Kingoriidae



Cistecephalidae



Myosauridae




 Bidentalia 
 Cryptodontia 

Rhachiocephalidae




Oudenodontidae



Geikiidae




 Dicynodontoidea 

"Dicynodon"




Lystrosauridae


 Kannemeyeriiformes 

Shansiodontidae



Kannemeyeriidae



Stahleckeriidae



Dinodontosauridae











References

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